Long-wave infrared metasurface absorber of silicon in microhole array structure

Jishu Tan; Qing Xiong; Changhong Chen

doi:10.1117/12.2602607

24 June 2021 Long-wave infrared metasurface absorber of silicon in microhole array structure

Jishu Tan, Qing Xiong, Changhong Chen

Proceedings Volume 11885, International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021); 118851B (2021) https://doi.org/10.1117/12.2602607
Event: 2021 International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021), 2021, Xi'an, China

Abstract

We proposed a doped silicon microhole arrays metasurface absorber that works in the long-wave infrared region. The absorbance of the absorber is significantly increased, we found the real part of the doped silicon refractive index decreases, which leads to the decrease of the equivalent refractive index of the structure. Guided mode resonance exists in the structure, which forms Fano resonance after interaction with external radiation. Fano resonance can limit the electromagnetic field in the structure, improve the interaction between light and doped silicon, and realize the purpose of absorption enhancement.Simulated results verify that the absorbance of the absorber with the optimized structure above 37.7% at 9.67 μm.

Citation Download Citation

Jishu Tan, Qing Xiong, and Changhong Chen "Long-wave infrared metasurface absorber of silicon in microhole array structure", Proc. SPIE 11885, International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021), 118851B (24 June 2021); https://doi.org/10.1117/12.2602607

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